WORMS, TESTACEA: 65. Arca. 253 
Rumpf. Muf. tab. 44. Y, Gualt, test. tab. 87. B, C. 
Petio. tab 17. fo 8. Klein ofr. tab. Yt. f. 75. 
Gronov, Zooph. tab. 18. f. 13. Murr. tefl. tab. 2, f. 15, 
Knorr Vergn. 1. tab. 24. fig. 35 4- 
Chemn,. coucb. 7- tab. $8. figs 548, $49. i 
Inhabits the Meaiterranean, Indian and American {cas, 
Shell rather large, white covered with a hairy fkin: the anterior 
flope with a comprefled prominent angle. if 
Senilis. Shell obliquely heart-fhaped, {mooth, with 8 grooves: 
- margin plaited. | ! 
Adanf. Seneg. 1. tab. 18. f. 5. 
Liffer conch. tab. 238. — Gualt. teh, tab. 87. D, 
Argenv. conch. tab. 23. hig- k, 
Chemn. conch. 7. tab. 56. f. §54--550. 
Jnhabits America and Africa: 3 inches long and 4 broad. 
Shell thick, white, covered with a black fkin mixed with fea-. 
green: anterior part gaping, 
Granofes Shell flightly heart-fhaped, with muricate grooves. 
Lifer, tab. 241. 242. Petiv. amb. tab. V7, f. 7. 
Major teft. tab. 10, f. 3. Rumpf. Muf. tab, 44. f, ke 
Gualt. teft. tab. 87, E. Argeny. conch. t. 33, C, © 
Klein oftr. tab. 10. f. 45, 46. 
Knorr Vergn. 6. tab. 34, fig. 2. 
Martin Befch. Naturf. 3. tab. 6. f. yo, 
Chemn. conch. 7. tab. 50. fig-5S57 
Inhabits the American and Indian Ocean: 1% inch long, 12 broad; 
white, nearly equilateral, with about zo ribs which are co- 
vered with fpinous tubercles, — A 
Corbicula. Shell ovate, a little compreffed, with perpendicular knotty 
ftri: beaks obtufe, approximate. 
Chemn. conch. 7. tab. 56. fig. 558. — 
2. Lister conch. tab. 234. fig. 68, 
Klein Offr. tab. 10. f. 43, 44- 
Chemnu. conch. 7. tab. 56. f. 559. 
Inhabits Nicobar I/fand:; refembles the Jaft; about 10 lines long, 
and an inch broad: 2) fubglobular with capillary ftrize within, 
Decuffata, Shell lenticular, with longitudinal ftrizs croffed by hardly 
vifible tranfverfe ones: anterior {lope clofed. 
Regenf. conch. 1. tab. 2* fig. 22. | 
Knorr Vergn. 5. tab. 30. fig. 3. 
Chemn. conch.7. tab. 57. fig. 561, 
Inhabits the American Ocean: fhel] varied with {cattered brown 
" fpots: Ainge flightly arched. 
SE, qii. 
